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          <h1 class="post-title" itemprop="name headline">视频压缩ffmpeg</h1>
        

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        <p>受够了网上那些所谓的免费压缩。还是自己动手吧。</p>
<hr>
<h2 id="下载"><a href="#下载" class="headerlink" title="下载"></a>下载</h2><p>地址：<a href="http://ffmpeg.org/download.html" target="_blank" rel="noopener">http://ffmpeg.org/download.html</a></p>
<h2 id="解压"><a href="#解压" class="headerlink" title="解压"></a>解压</h2><h2 id="路径添加到path"><a href="#路径添加到path" class="headerlink" title="路径添加到path"></a>路径添加到path</h2><h2 id="视频压缩命令"><a href="#视频压缩命令" class="headerlink" title="视频压缩命令"></a>视频压缩命令</h2><blockquote>
<p>微信不允许传输超过25兆的视频，在这里设置分辨率800X400<br><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">ffmpeg -y -i video.mp4 -ss 00:00:00.0 -t 00:06:00.0 -ab 56k -ar 44100 -b:v 2200k -r 29.97 -s 480x800 out.mp4</span><br></pre></td></tr></table></figure></p>
</blockquote>
<h2 id="参数说明"><a href="#参数说明" class="headerlink" title="参数说明"></a>参数说明</h2><ol>
<li><p>通用选项</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br></pre></td><td class="code"><pre><span class="line">-L license</span><br><span class="line">-h 帮助</span><br><span class="line">-fromats 显示可用的格式，编解码的，协议的...</span><br><span class="line">-f fmt 强迫采用格式fmt</span><br><span class="line">-I filename 输入文件</span><br><span class="line">-y 覆盖输出文件</span><br><span class="line">-t duration 设置纪录时间 hh:mm:ss[.xxx]格式的记录时间也支持</span><br><span class="line">-ss position 搜索到指定的时间 [-]hh:mm:ss[.xxx]的格式也支持</span><br><span class="line">-title string 设置标题</span><br><span class="line">-author string 设置作者</span><br><span class="line">-copyright string 设置版权</span><br><span class="line">-comment string 设置评论</span><br><span class="line">-target type 设置目标文件类型(vcd,svcd,dvd) 所有的格式选项（比特率，编解码以及缓冲区大小）自动设置，只需要输入如下的就可以了：ffmpeg -i myfile.avi -target vcd /tmp/vcd.mpg</span><br><span class="line">-hq 激活高质量设置</span><br><span class="line">-itsoffset offset 设置以秒为基准的时间偏移，该选项影响所有后面的输入文件。该偏移被加到输入文件的时戳，定义一个正偏移意味着相应的流被延迟了 offset秒。 [-]hh:mm:ss[.xxx]的格式也支持</span><br></pre></td></tr></table></figure>
</li>
<li><p>视频选项</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br></pre></td><td class="code"><pre><span class="line">-b bitrate 设置比特率，缺省200kb/s</span><br><span class="line">-r fps 设置帧频 缺省25</span><br><span class="line">-s size 设置帧大小 格式为WXH 缺省160X128.下面的简写也可以直接使用：</span><br><span class="line">Sqcif 128X96 qcif 176X144 cif 252X288 4cif 704X576</span><br><span class="line">-aspect aspect 设置横纵比 4:3 16:9 或 1.3333 1.7777</span><br><span class="line">-croptop size 设置顶部切除带大小 像素单位</span><br><span class="line">-cropbottom size –cropleft size –cropright size</span><br><span class="line">-padtop size 设置顶部补齐的大小 像素单位</span><br><span class="line">-padbottom size –padleft size –padright size –padcolor color 设置补齐条颜色(hex,6个16进制的数，红:绿:兰排列，比如 000000代表黑色)</span><br><span class="line">-vn 不做视频记录</span><br><span class="line">-bt tolerance 设置视频码率容忍度kbit/s</span><br><span class="line">-maxrate bitrate设置最大视频码率容忍度</span><br><span class="line">-minrate bitreate 设置最小视频码率容忍度</span><br><span class="line">-bufsize size 设置码率控制缓冲区大小</span><br><span class="line">-vcodec codec 强制使用codec编解码方式。如果用copy表示原始编解码数据必须被拷贝。</span><br><span class="line">-sameq 使用同样视频质量作为源（VBR）</span><br><span class="line">-pass n 选择处理遍数（1或者2）。两遍编码非常有用。第一遍生成统计信息，第二遍生成精确的请求的码率</span><br><span class="line">-passlogfile file 选择两遍的纪录文件名为file</span><br></pre></td></tr></table></figure>
</li>
<li><p>高级视频选项</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br></pre></td><td class="code"><pre><span class="line">-g gop_size 设置图像组大小</span><br><span class="line">-intra 仅适用帧内编码</span><br><span class="line">-qscale q 使用固定的视频量化标度(VBR)</span><br><span class="line">-qmin q 最小视频量化标度(VBR)</span><br><span class="line">-qmax q 最大视频量化标度(VBR)</span><br><span class="line">-qdiff q 量化标度间最大偏差 (VBR)</span><br><span class="line">-qblur blur 视频量化标度柔化(VBR)</span><br><span class="line">-qcomp compression 视频量化标度压缩(VBR)</span><br><span class="line">-rc_init_cplx complexity 一遍编码的初始复杂度</span><br><span class="line">-b_qfactor factor 在p和b帧间的qp因子</span><br><span class="line">-i_qfactor factor 在p和i帧间的qp因子</span><br><span class="line">-b_qoffset offset 在p和b帧间的qp偏差</span><br><span class="line">-i_qoffset offset 在p和i帧间的qp偏差</span><br><span class="line">-rc_eq equation 设置码率控制方程 默认tex^qComp</span><br><span class="line">-rc_override override 特定间隔下的速率控制重载</span><br><span class="line">-me method 设置运动估计的方法 可用方法有 zero phods log x1 epzs(缺省) full</span><br><span class="line">-dct_algo algo 设置dct的算法 可用的有 0 FF_DCT_AUTO 缺省的DCT 1 FF_DCT_FASTINT 2 FF_DCT_INT 3 FF_DCT_MMX 4 FF_DCT_MLIB 5 FF_DCT_ALTIVEC</span><br><span class="line">-idct_algo algo 设置idct算法。可用的有 0 FF_IDCT_AUTO 缺省的IDCT 1 FF_IDCT_INT 2 FF_IDCT_SIMPLE 3 FF_IDCT_SIMPLEMMX 4 FF_IDCT_LIBMPEG2MMX 5 FF_IDCT_PS2 6 FF_IDCT_MLIB 7 FF_IDCT_ARM 8 FF_IDCT_ALTIVEC 9 FF_IDCT_SH4 10 FF_IDCT_SIMPLEARM</span><br><span class="line">-er n 设置错误残留为n 1 FF_ER_CAREFULL 缺省 2 FF_ER_COMPLIANT 3 FF_ER_AGGRESSIVE 4 FF_ER_VERY_AGGRESSIVE</span><br><span class="line">-ec bit_mask 设置错误掩蔽为bit_mask,该值为如下值的位掩码 1 FF_EC_GUESS_MVS (default=enabled) 2 FF_EC_DEBLOCK (default=enabled)</span><br><span class="line">-bf frames 使用frames B 帧，支持mpeg1,mpeg2,mpeg4</span><br><span class="line">-mbd mode 宏块决策 0 FF_MB_DECISION_SIMPLE 使用mb_cmp 1 FF_MB_DECISION_BITS 2 FF_MB_DECISION_RD</span><br><span class="line">-4mv 使用4个运动矢量 仅用于mpeg4</span><br><span class="line">-part 使用数据划分 仅用于mpeg4</span><br><span class="line">-bug param 绕过没有被自动监测到编码器的问题</span><br><span class="line">-strict strictness 跟标准的严格性</span><br><span class="line">-aic 使能高级帧内编码 h263+</span><br><span class="line">-umv 使能无限运动矢量 h263+</span><br><span class="line">-deinterlace 不采用交织方法</span><br><span class="line">-interlace 强迫交织法编码仅对mpeg2和mpeg4有效。当你的输入是交织的并且你想要保持交织以最小图像损失的时候采用该选项。可选的方法是不交织，但是损失更大</span><br><span class="line">-psnr 计算压缩帧的psnr</span><br><span class="line">-vstats 输出视频编码统计到vstats_hhmmss.log</span><br><span class="line">-vhook module 插入视频处理模块 module 包括了模块名和参数，用空格分开</span><br></pre></td></tr></table></figure>
</li>
<li><p>音频选项</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">-ab bitrate 设置音频码率</span><br><span class="line">-ar freq 设置音频采样率</span><br><span class="line">-ac channels 设置通道 缺省为1</span><br><span class="line">-an 不使能音频纪录</span><br><span class="line">-acodec codec 使用codec编解码</span><br></pre></td></tr></table></figure>
</li>
<li><p>音频/视频捕获选项</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">-vd device 设置视频捕获设备。比如/dev/video0</span><br><span class="line">-vc channel 设置视频捕获通道 DV1394专用</span><br><span class="line">-tvstd standard 设置电视标准 NTSC PAL(SECAM)</span><br><span class="line">-dv1394 设置DV1394捕获</span><br><span class="line">-av device 设置音频设备 比如/dev/dsp</span><br></pre></td></tr></table></figure>
</li>
<li><p>高级选项</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line">-map file:stream 设置输入流映射</span><br><span class="line">-debug 打印特定调试信息</span><br><span class="line">-benchmark 为基准测试加入时间</span><br><span class="line">-hex 倾倒每一个输入包</span><br><span class="line">-bitexact 仅使用位精确算法 用于编解码测试</span><br><span class="line">-ps size 设置包大小，以bits为单位</span><br><span class="line">-re 以本地帧频读数据，主要用于模拟捕获设备</span><br><span class="line">-loop 循环输入流（只工作于图像流，用于ffserver测试）</span><br></pre></td></tr></table></figure>
</li>
</ol>
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  <p><span>本文标题:</span><a href="/2018/03/18/视频压缩ffmpeg/">视频压缩ffmpeg</a></p>
  <p><span>文章作者:</span><a href="/" title="访问 Q.hongtao 的个人博客">Q.hongtao</a></p>
  <p><span>发布时间:</span>2018年03月18日 - 13:03</p>
  <p><span>最后更新:</span>2018年03月18日 - 18:03</p>
  <p><span>原始链接:</span><a href="/2018/03/18/视频压缩ffmpeg/" title="视频压缩ffmpeg">http://7ht.gitee.io/2018/03/18/视频压缩ffmpeg/</a>
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